*x = 0.8f;
*n = 2;
*font = BaseFont.CreateFont("Helvetica", "winansi", false);
*size = 8;
*baseline = size;
*barHeight = size * 3;
*textAlignment = Element.ALIGN_CENTER;
*generateChecksum = false;
*checksumText = false;
*startStopText = false;
*
*
* @author Paulo Soares (psoares@consiste.pt)
*/
public class BarcodeCodabar : Barcode{
/** The bars to generate the code.
*/
private static readonly byte[][] BARS = new byte[][] {
new byte[]{0,0,0,0,0,1,1}, // 0
new byte[]{0,0,0,0,1,1,0}, // 1
new byte[]{0,0,0,1,0,0,1}, // 2
new byte[]{1,1,0,0,0,0,0}, // 3
new byte[]{0,0,1,0,0,1,0}, // 4
new byte[]{1,0,0,0,0,1,0}, // 5
new byte[]{0,1,0,0,0,0,1}, // 6
new byte[]{0,1,0,0,1,0,0}, // 7
new byte[]{0,1,1,0,0,0,0}, // 8
new byte[]{1,0,0,1,0,0,0}, // 9
new byte[]{0,0,0,1,1,0,0}, // -
new byte[]{0,0,1,1,0,0,0}, // $
new byte[]{1,0,0,0,1,0,1}, // :
new byte[]{1,0,1,0,0,0,1}, // /
new byte[]{1,0,1,0,1,0,0}, // .
new byte[]{0,0,1,0,1,0,1}, // +
new byte[]{0,0,1,1,0,1,0}, // a
new byte[]{0,1,0,1,0,0,1}, // b
new byte[]{0,0,0,1,0,1,1}, // c
new byte[]{0,0,0,1,1,1,0} // d
};
/** The index chars to BARS.
*/
private const string CHARS = "0123456789-$:/.+ABCD";
private const int START_STOP_IDX = 16;
/** Creates a new BarcodeCodabar.
*/
public BarcodeCodabar() {
x = 0.8f;
n = 2;
font = BaseFont.CreateFont("Helvetica", "winansi", false);
size = 8;
baseline = size;
barHeight = size * 3;
textAlignment = Element.ALIGN_CENTER;
generateChecksum = false;
checksumText = false;
startStopText = false;
codeType = CODABAR;
}
/** Creates the bars.
* @param text the text to create the bars
* @return the bars
*/
public static byte[] GetBarsCodabar(String text) {
text = text.ToUpper(System.Globalization.CultureInfo.InvariantCulture);
int len = text.Length;
if (len < 2)
throw new ArgumentException("Codabar must have at least a start and stop character.");
if (CHARS.IndexOf(text[0]) < START_STOP_IDX || CHARS.IndexOf(text[len - 1]) < START_STOP_IDX)
throw new ArgumentException("Codabar must have one of 'ABCD' as start/stop character.");
byte[] bars = new byte[text.Length * 8 - 1];
for (int k = 0; k < len; ++k) {
int idx = CHARS.IndexOf(text[k]);
if (idx >= START_STOP_IDX && k > 0 && k < len - 1)
throw new ArgumentException("In codabar, start/stop characters are only allowed at the extremes.");
if (idx < 0)
throw new ArgumentException("The character '" + text[k] + "' is illegal in codabar.");
Array.Copy(BARS[idx], 0, bars, k * 8, 7);
}
return bars;
}
public static String CalculateChecksum(String code) {
if (code.Length < 2)
return code;
String text = code.ToUpper(System.Globalization.CultureInfo.InvariantCulture);
int sum = 0;
int len = text.Length;
for (int k = 0; k < len; ++k)
sum += CHARS.IndexOf(text[k]);
sum = (sum + 15) / 16 * 16 - sum;
return code.Substring(0, len - 1) + CHARS[sum] + code.Substring(len - 1);
}
/** Gets the maximum area that the barcode and the text, if
* any, will occupy. The lower left corner is always (0, 0).
* @return the size the barcode occupies.
*/
public override Rectangle BarcodeSize {
get {
float fontX = 0;
float fontY = 0;
String text = code;
if (generateChecksum && checksumText)
text = CalculateChecksum(code);
if (!startStopText)
text = text.Substring(1, text.Length - 2);
if (font != null) {
if (baseline > 0)
fontY = baseline - font.GetFontDescriptor(BaseFont.DESCENT, size);
else
fontY = -baseline + size;
fontX = font.GetWidthPoint(altText != null ? altText : text, size);
}
text = code;
if (generateChecksum)
text = CalculateChecksum(code);
byte[] bars = GetBarsCodabar(text);
int wide = 0;
for (int k = 0; k < bars.Length; ++k) {
wide += (int)bars[k];
}
int narrow = bars.Length - wide;
float fullWidth = x * (narrow + wide * n);
fullWidth = Math.Max(fullWidth, fontX);
float fullHeight = barHeight + fontY;
return new Rectangle(fullWidth, fullHeight);
}
}
/** Places the barcode in a PdfContentByte. The
* barcode is always placed at coodinates (0, 0). Use the
* translation matrix to move it elsewhere.* The bars and text are written in the following colors:
*
|
*
|
* Result |
*
|---|---|---|
|
*
|
* bars and text painted with current fill color |
*
|
*
|
* bars and text painted with |
*
|
*
|
* bars painted with current color |
*
|
*
|
* bars painted with |
*
PdfContentByte where the barcode will be placed
* @param barColor the color of the bars. It can be null
* @param textColor the color of the text. It can be null
* @return the dimensions the barcode occupies
*/
public override Rectangle PlaceBarcode(PdfContentByte cb, Color barColor, Color textColor) {
String fullCode = code;
if (generateChecksum && checksumText)
fullCode = CalculateChecksum(code);
if (!startStopText)
fullCode = fullCode.Substring(1, fullCode.Length - 2);
float fontX = 0;
if (font != null) {
fontX = font.GetWidthPoint(fullCode = altText != null ? altText : fullCode, size);
}
byte[] bars = GetBarsCodabar(generateChecksum ? CalculateChecksum(code) : code);
int wide = 0;
for (int k = 0; k < bars.Length; ++k) {
wide += (int)bars[k];
}
int narrow = bars.Length - wide;
float fullWidth = x * (narrow + wide * n);
float barStartX = 0;
float textStartX = 0;
switch (textAlignment) {
case Element.ALIGN_LEFT:
break;
case Element.ALIGN_RIGHT:
if (fontX > fullWidth)
barStartX = fontX - fullWidth;
else
textStartX = fullWidth - fontX;
break;
default:
if (fontX > fullWidth)
barStartX = (fontX - fullWidth) / 2;
else
textStartX = (fullWidth - fontX) / 2;
break;
}
float barStartY = 0;
float textStartY = 0;
if (font != null) {
if (baseline <= 0)
textStartY = barHeight - baseline;
else {
textStartY = -font.GetFontDescriptor(BaseFont.DESCENT, size);
barStartY = textStartY + baseline;
}
}
bool print = true;
if (barColor != null)
cb.SetColorFill(barColor);
for (int k = 0; k < bars.Length; ++k) {
float w = (bars[k] == 0 ? x : x * n);
if (print)
cb.Rectangle(barStartX, barStartY, w - inkSpreading, barHeight);
print = !print;
barStartX += w;
}
cb.Fill();
if (font != null) {
if (textColor != null)
cb.SetColorFill(textColor);
cb.BeginText();
cb.SetFontAndSize(font, size);
cb.SetTextMatrix(textStartX, textStartY);
cb.ShowText(fullCode);
cb.EndText();
}
return BarcodeSize;
}
public override System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
String fullCode = code;
if (generateChecksum && checksumText)
fullCode = CalculateChecksum(code);
if (!startStopText)
fullCode = fullCode.Substring(1, fullCode.Length - 2);
byte[] bars = GetBarsCodabar(generateChecksum ? CalculateChecksum(code) : code);
int wide = 0;
for (int k = 0; k < bars.Length; ++k) {
wide += (int)bars[k];
}
int narrow = bars.Length - wide;
int fullWidth = narrow + wide * (int)n;
int height = (int)barHeight;
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(fullWidth, height);
for (int h = 0; h < height; ++h) {
bool print = true;
int ptr = 0;
for (int k = 0; k < bars.Length; ++k) {
int w = (bars[k] == 0 ? 1 : (int)n);
System.Drawing.Color c = background;
if (print)
c = foreground;
print = !print;
for (int j = 0; j < w; ++j)
bmp.SetPixel(ptr++, h, c);
}
}
return bmp;
}
}
}